1 /* 2 * Utility functions for base types. 3 * 4 * Copyright (C) 2022, 2023 Paul Boddie <paul@boddie.org.uk> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA 20 */ 21 22 #include <l4/re/c/dataspace.h> 23 24 #include "base.h" 25 26 27 28 /* Return mapping flags corresponding to page fault flags. */ 29 30 map_flags_t map_flags_for_fault(l4_umword_t flags) 31 { 32 map_flags_t map_flags = (flags & 4 ? L4RE_DS_F_RX : 0) | 33 (flags & 2 ? L4RE_DS_F_W : 0) | 34 (flags & 1 ? L4RE_DS_F_R : 0); 35 36 if (!map_flags) 37 map_flags = L4RE_DS_F_R; 38 39 return map_flags; 40 } 41 42 // vim: tabstop=2 expandtab shiftwidth=2